Here's what rhymes with nonidiomatic.
idiomatic dramatic asthmatic fanatic automatic diplomatic static hepatic aromatic dogmatic emphatic pragmatic somatic thematic traumatic erratic pneumatic rheumatic spermatic nondramatic unidiomatic systematic climatic schematic symptomatic lymphatic aliphatic axiomatic chromatic cinematic emblematic kinematic operatic prismatic magmatic theocratic stigmatic undramatic undiplomatic unemphatic aerobatic democratic problematic asymptomatic autocratic charismatic ecstatic enigmatic enzymatic metastatic prostatic melodramatic monochromatic programmatic achromatic diagrammatic intrahepatic muriatic phlegmatic unsystematic zygomatic acrobatic antidemocratic epigrammatic schismatic astigmatic numismatic aristocratic bureaucratic pancreatic idiosyncratic paradigmatic psychosomatic diaphragmatic technocratic undemocratic unproblematic meritocratic nondemocratic panchromatic plutocratic semiautomatic thermostatic photostatic hydrostatic homeostatic orthostatic posttraumatic homoeostatic electrostatic Words that almost rhyme with nonidiomatic
magic tragic nomadic pelagic syllabic sporadic apparatchik priapic disyllabic monosyllabic polysyllabic manic mastic panic monastic lactic tactic phallic tannic malefic dynamic traffic classic elastic plastic romantic fabric fantastic gastric geographic graphic metallic semantic ceramic drastic frantic catholic dynastic mechanic pediatric synaptic galactic pedantic spastic aplastic clastic gymnastic italic satanic bombastic paediatric botanic tyrannic matchstick organic gigantic scholastic thoracic volcanic barbaric didactic hemorrhagic inelastic neoplastic oceanic sarcastic cephalic climactic galvanic geriatric messianic ophthalmic panoramic presynaptic thalamic tympanic haemorrhagic titanic bimetallic slapstick unromantic ataxic biographic osteopathic baldric nonelastic demographic psychiatric inorganic stochastic thermodynamic ecclesiastic glutamic nostalgic telegraphic topographic angiographic heraldic psychopathic isobaric nonmetallic orgiastic typographic anticlimactic intergalactic neoclassic periphrastic sycophantic enthusiastic photographic ethnographic hypothalamic prophylactic radiographic aerodynamic bibliographic hemodynamic pornographic postsynaptic anaphylactic holographic hyperplastic hypoplastic iconoclastic iconographic intrathoracic lithographic splanchnic thermoplastic tomographic viscoelastic oceanographic stenographic autobiographic calligraphic choreographic interscholastic phonographic xerographic cytoplasmic endoplasmic hydrodynamic psychodynamic stratigraphic transatlantic cartographic orthographic chiropractic unenthusiastic transoceanic seismographic chromatographic protoplasmic cinematographic overenthusiastic crystallographic lexicographic electrocardiographic electroencephalographic